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Note 5 - Loan Payable (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 66 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2018
Sep. 25, 2014
Jan. 26, 2009
Construction Loan             $ 7,750,000
PA-1 [Member]              
Debt Instrument, Debt Default, Amount           $ 8,137,117  
Pennvest Loan [Member]              
Construction Loan $ 9,228,213   $ 9,228,213        
Accrued Interest and Late Charges Payable 1,474,213   1,474,213        
Line of Credit Facility, Maximum Borrowing Capacity 7,754,000   $ 7,754,000        
Term Loan, Period for Interest Only Payments     3 years        
Term Loan, Period for Amortization of Principal     10 years        
Repayments of Long-term Debt, Total         $ 3,502,000    
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year         771,000    
Long-term Debt, Maturities, Repayments of Principal in Year Two         794,000    
Long-term Debt, Maturities, Repayments of Principal in Year Three         819,000    
Long-term Debt, Maturities, Repayments of Principal in Year Four         846,000    
Long-term Debt, Maturities, Repayments of Principal in Year Five         873,000    
Long-term Debt, Maturities, Repayments of Principal after Year Five         $ 149,000    
Interest Expense, Debt, Total $ 59,109 $ 49,373 $ 172,856 $ 148,121      
Pennvest Loan [Member] | Years One Through Five [Member]              
Debt Instrument, Interest Rate During Period     2.547%        
Pennvest Loan [Member] | Years Six Through Maturity [Member]              
Debt Instrument, Interest Rate During Period     3.184%